Mercurial > hg > graal-compiler
view src/share/vm/interpreter/bytecode.hpp @ 1565:ab102d5d923e
6939207: refactor constant pool index processing
Summary: Factored cleanup of instruction decode which prepares for enhanced ldc semantics.
Reviewed-by: twisti
author | jrose |
---|---|
date | Sun, 23 May 2010 01:38:26 -0700 |
parents | dd57230ba8fe |
children | e9ff18c4ace7 |
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/* * Copyright 1997-2010 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // Base class for different kinds of abstractions working // relative to an objects 'this' pointer. class ThisRelativeObj VALUE_OBJ_CLASS_SPEC { public: // Address computation address addr_at (int offset) const { return (address)this + offset; } int byte_at (int offset) const { return *(addr_at(offset)); } address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); } int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); } // Word access: int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); } int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); } int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); } int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); } }; // The base class for different kinds of bytecode abstractions. // Provides the primitive operations to manipulate code relative // to an objects 'this' pointer. // FIXME: Make this a ResourceObj, include the enclosing methodOop, and cache the opcode. class Bytecode: public ThisRelativeObj { protected: u_char byte_at(int offset) const { return *addr_at(offset); } bool check_must_rewrite(Bytecodes::Code bc) const; public: // Attributes address bcp() const { return addr_at(0); } int instruction_size() const { return Bytecodes::length_at(bcp()); } // Warning: Use code() with caution on live bytecode streams. 4926272 Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); } Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); } bool must_rewrite(Bytecodes::Code code) const { return Bytecodes::can_rewrite(code) && check_must_rewrite(code); } // Creation inline friend Bytecode* Bytecode_at(address bcp); // Static functions for parsing bytecodes in place. int get_index_u1(Bytecodes::Code bc) const { assert_same_format_as(bc); assert_index_size(1, bc); return *(jubyte*)addr_at(1); } int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const { assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide); address p = addr_at(is_wide ? 2 : 1); if (can_use_native_byte_order(bc, is_wide)) return Bytes::get_native_u2(p); else return Bytes::get_Java_u2(p); } int get_index_u2_cpcache(Bytecodes::Code bc) const { assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc); return Bytes::get_native_u2(addr_at(1)) DEBUG_ONLY(+ constantPoolOopDesc::CPCACHE_INDEX_TAG); } int get_index_u4(Bytecodes::Code bc) const { assert_same_format_as(bc); assert_index_size(4, bc); assert(can_use_native_byte_order(bc), ""); return Bytes::get_native_u4(addr_at(1)); } bool has_index_u4(Bytecodes::Code bc) const { return bc == Bytecodes::_invokedynamic; } int get_offset_s2(Bytecodes::Code bc) const { assert_same_format_as(bc); assert_offset_size(2, bc); return (jshort) Bytes::get_Java_u2(addr_at(1)); } int get_offset_s4(Bytecodes::Code bc) const { assert_same_format_as(bc); assert_offset_size(4, bc); return (jint) Bytes::get_Java_u4(addr_at(1)); } int get_constant_u1(int offset, Bytecodes::Code bc) const { assert_same_format_as(bc); assert_constant_size(1, offset, bc); return *(jbyte*)addr_at(offset); } int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const { assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide); return (jshort) Bytes::get_Java_u2(addr_at(offset)); } // These are used locally and also from bytecode streams. void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN; static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) { return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/)); } }; inline Bytecode* Bytecode_at(address bcp) { // Warning: Use with caution on live bytecode streams. 4926272 return (Bytecode*)bcp; } // Abstractions for lookupswitch bytecode class LookupswitchPair: ThisRelativeObj { private: int _match; int _offset; public: int match() const { return get_Java_u4_at(0 * jintSize); } int offset() const { return get_Java_u4_at(1 * jintSize); } }; class Bytecode_lookupswitch: public Bytecode { public: void verify() const PRODUCT_RETURN; // Attributes int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); } int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); } LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds"); return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); } // Creation inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp); }; inline Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp) { Bytecode_lookupswitch* b = (Bytecode_lookupswitch*)bcp; debug_only(b->verify()); return b; } class Bytecode_tableswitch: public Bytecode { public: void verify() const PRODUCT_RETURN; // Attributes int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); } int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); } int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); } int dest_offset_at(int i) const; int length() { return high_key()-low_key()+1; } // Creation inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp); }; inline Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp) { Bytecode_tableswitch* b = (Bytecode_tableswitch*)bcp; debug_only(b->verify()); return b; } // Abstraction for invoke_{virtual, static, interface, special} class Bytecode_invoke: public ResourceObj { protected: methodHandle _method; // method containing the bytecode int _bci; // position of the bytecode Bytecode_invoke(methodHandle method, int bci) : _method(method), _bci(bci) {} public: void verify() const; // Attributes methodHandle method() const { return _method; } int bci() const { return _bci; } address bcp() const { return _method->bcp_from(bci()); } int index() const; // the constant pool index for the invoke symbolOop name() const; // returns the name of the invoked method symbolOop signature() const; // returns the signature of the invoked method BasicType result_type(Thread *thread) const; // returns the result type of the invoke Bytecodes::Code code() const { return Bytecodes::code_at(bcp(), _method()); } Bytecodes::Code adjusted_invoke_code() const { return Bytecodes::java_code(code()); } methodHandle static_target(TRAPS); // "specified" method (from constant pool) // Testers bool is_invokeinterface() const { return adjusted_invoke_code() == Bytecodes::_invokeinterface; } bool is_invokevirtual() const { return adjusted_invoke_code() == Bytecodes::_invokevirtual; } bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; } bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; } bool is_invokedynamic() const { return adjusted_invoke_code() == Bytecodes::_invokedynamic; } bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); } bool is_valid() const { return is_invokeinterface() || is_invokevirtual() || is_invokestatic() || is_invokespecial() || is_invokedynamic(); } // Creation inline friend Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci); // Like Bytecode_invoke_at. Instead it returns NULL if the bci is not at an invoke. inline friend Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci); }; inline Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci) { Bytecode_invoke* b = new Bytecode_invoke(method, bci); debug_only(b->verify()); return b; } inline Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci) { Bytecode_invoke* b = new Bytecode_invoke(method, bci); return b->is_valid() ? b : NULL; } // Abstraction for all field accesses (put/get field/static_ class Bytecode_field: public Bytecode { public: void verify() const; int index() const; bool is_static() const; // Creation inline friend Bytecode_field* Bytecode_field_at(const methodOop method, address bcp); }; inline Bytecode_field* Bytecode_field_at(const methodOop method, address bcp) { Bytecode_field* b = (Bytecode_field*)bcp; debug_only(b->verify()); return b; } // Abstraction for checkcast class Bytecode_checkcast: public Bytecode { public: void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); } // Returns index long index() const { return get_index_u2(Bytecodes::_checkcast); }; // Creation inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp); }; inline Bytecode_checkcast* Bytecode_checkcast_at(address bcp) { Bytecode_checkcast* b = (Bytecode_checkcast*)bcp; debug_only(b->verify()); return b; } // Abstraction for instanceof class Bytecode_instanceof: public Bytecode { public: void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); } // Returns index long index() const { return get_index_u2(Bytecodes::_instanceof); }; // Creation inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp); }; inline Bytecode_instanceof* Bytecode_instanceof_at(address bcp) { Bytecode_instanceof* b = (Bytecode_instanceof*)bcp; debug_only(b->verify()); return b; } class Bytecode_new: public Bytecode { public: void verify() const { assert(java_code() == Bytecodes::_new, "check new"); } // Returns index long index() const { return get_index_u2(Bytecodes::_new); }; // Creation inline friend Bytecode_new* Bytecode_new_at(address bcp); }; inline Bytecode_new* Bytecode_new_at(address bcp) { Bytecode_new* b = (Bytecode_new*)bcp; debug_only(b->verify()); return b; } class Bytecode_multianewarray: public Bytecode { public: void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); } // Returns index long index() const { return get_index_u2(Bytecodes::_multianewarray); }; // Creation inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp); }; inline Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp) { Bytecode_multianewarray* b = (Bytecode_multianewarray*)bcp; debug_only(b->verify()); return b; } class Bytecode_anewarray: public Bytecode { public: void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); } // Returns index long index() const { return get_index_u2(Bytecodes::_anewarray); }; // Creation inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp); }; inline Bytecode_anewarray* Bytecode_anewarray_at(address bcp) { Bytecode_anewarray* b = (Bytecode_anewarray*)bcp; debug_only(b->verify()); return b; } // Abstraction for ldc, ldc_w and ldc2_w class Bytecode_loadconstant: public Bytecode { public: void verify() const { Bytecodes::Code stdc = Bytecodes::java_code(code()); assert(stdc == Bytecodes::_ldc || stdc == Bytecodes::_ldc_w || stdc == Bytecodes::_ldc2_w, "load constant"); } int index() const; inline friend Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp); }; inline Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp) { Bytecode_loadconstant* b = (Bytecode_loadconstant*)bcp; debug_only(b->verify()); return b; }